|Artlip, Timothy - Tim|
Submitted to: Plant and Animal Genome Conference Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: 12/5/2005
Publication Date: 1/14/2006
Citation: Bassett, C.L., Artlip, T.S., Wisniewski, M.E., Norelli, J.L., Renaut, J., Farrell, R. 2006. Comparative expression of peach genes regulated by low temperature and photoperiod [abstract]. Plant and Animal Genome Conference Proceedings. p. 224.
Technical Abstract: Plants express a variety of genes in response to different stresses, and often those responding to multiple stresses represent unique gene family members whose expression is regulated by a specific stress. To characterize expression of select peach [Prunus persica (L.) Batsch.] abiotic stress-related genes to different environmental signals, we used semi-quantitative RT-PCR to follow expression of these genes in bark in response to low temperature, photoperiod, drought, and in the field during a complete seasonal cycle. PpDhn1 and PpDhn3 transcripts reached a maximum in December and a minimum in July. In response to low temperature under controlled conditions, expression of both genes increased, but little response to short day photoperiods was observed. Water deficit treatment did not alter expression of either gene. In contrast, PpDhn2 showed little seasonal expression and no response to low temperature or photoperiod. However, PpDhn2 transcripts were significantly increased in response to water deficit. Among the other peach stress-related genes analyzed, only a Group IV LEA-homologue showed any increase in response to water deficit. A number of other genes showed seasonal differences similar to PpDhn1 and PpDhn3, albeit at lower levels, and one gene increased primarily in response to long days.